Device for producing glucosyl stevioside at low cost

Abstract

The utility model discloses a device for producing glucosyl stevioside at low cost. The device comprises a reaction feed liquid storage tank, a continuous reaction system, an enzyme deactivation tank, a buffer tank, a resin column, a drying tank and a glucosyl stevioside temporary storage tank which are communicated with one another, the continuous reaction system comprises at least two reaction tanks which are sequentially connected in series, and a peristaltic pump is arranged on a feeding pipeline of each reaction tank; each reaction tank is communicated with an enzyme storage tank; the feeding hole of the resin column is also respectively communicated with a water storage tank and a desorption agent storage tank; the discharge holes of the resin columns are respectively communicated with a concentration tank; a feed liquid outlet of the concentration tank is communicated with a waste liquid recovery tank. According to the device, continuous production of glucosyl stevioside is realized, the utilization rate of enzyme is improved, waste liquid in production is recycled, and the preparation cost of a product is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stevioside preparation, in particular to a device for producing glucose-based stevioside at low cost. Background Art

[0002] Stevioside is a sweet compound extracted from stevia and is widely used as a food sweetener. However, stevioside has a certain bitter taste, which may not be popular with some consumers. Therefore, researchers began to try to reduce the bitterness of stevioside and improve its sweetness quality. Glucosyl steviol glycoside is obtained by enzymatically glucosylating stevioside extracted from stevia leaves, followed by evaporation concentration and spray drying. After enzymatic treatment of stevioside, the bitterness and other unpleasant flavors are significantly improved. After enzyme modification, its main components include glucosyl steviol glycoside (GSG) ≥ 75% and maltodextrin ≤ 20%.

[0003] At present, the device for producing glucosyl steviol glycoside is mainly a single reaction tank, and the reaction raw materials and enzymes are added into the reaction tank at one time for reaction. Usually, the enzyme is in an excess state, and the enzyme utilization rate is low, which increases the production cost of glucosyl steviol glycoside. In addition, the amount of waste liquid generated during the reaction is large, and if it is not recycled, it will cause energy waste and increase the cost of sewage treatment. In order to solve the above technical problems, it is necessary to provide a new device for producing glucosyl steviol glycoside. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a low-cost device for producing glucose-based stevioside is provided, which not only realizes the continuous production of glucose-based stevioside, but also improves the utilization rate of enzymes, and the waste liquid in the production is recycled, thereby greatly reducing the preparation cost of the product.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A low-cost device for producing glucose-based stevioside comprises a connected reaction liquid storage tank, a continuous reaction system, an enzyme inactivation tank, a buffer tank, a resin column, a drying tank and a glucose-based stevioside temporary storage tank;

[0007] The continuous reaction system comprises at least two reaction tanks connected in series, each reaction tank having a peristaltic pump disposed on its feed pipeline; each reaction tank is connected to an enzyme storage tank;

[0008] The feed inlet of the resin column is also connected to a water storage tank and a desorbent storage tank respectively; the discharge port of the resin column is also connected to a concentration tank respectively; and the liquid outlet of the concentration tank is connected to a waste liquid recovery tank.

[0009] As a preferred embodiment of the above technical solution, the continuous reaction system includes a first reaction tank, a second reaction tank, a third reaction tank, and a fourth reaction tank connected in series in sequence, the feed port of the first reaction tank is connected to the discharge port of the reaction liquid storage tank; the discharge port of the fourth reaction tank is connected to the feed port of the enzyme inactivation tank.

[0010] As a preferred embodiment of the above technical solution, the feed ports of the first reaction tank, the second reaction tank, the third reaction tank and the fourth reaction tank are all connected to the alkali solution storage tank and the acid solution storage tank, and the first reaction tank, the second reaction tank, the third reaction tank and the fourth reaction tank are all provided with pH sensors.

[0011] As an improvement of the above technical solution, a stirring device is provided in each of the first reaction tank, the second reaction tank, the third reaction tank and the fourth reaction tank.

[0012] As an improvement of the above technical solution, a steam coil is sleeved on the outer side of the enzyme inactivation tank, the air inlet of the steam coil is connected to the steam storage tank, and the liquid outlet of the steam coil is connected to the steam storage tank through a heater.

[0013] As an improvement of the above technical solution, a stirring device is also provided in the reaction liquid storage tank, enzyme inactivation tank, buffer tank and drying tank.

[0014] As an improvement of the above technical solution, the gas outlet of the concentration tank is connected to the reaction liquid storage tank through a condenser.

[0015] As an improvement of the above technical solution, the liquid outlet of the resin column is also connected to the waste liquid recovery tank.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] The utility model provides a low-cost device for producing glucose-based stevioside, comprising a connected reaction liquid storage tank, a continuous reaction system, an enzyme inactivation tank, a buffer tank, a resin column, a drying tank and a glucose-based stevioside temporary storage tank; the continuous reaction system comprises a first reaction tank, a second reaction tank, a third reaction tank and a fourth reaction tank connected in series in sequence, the feed port of the first reaction tank is connected to the discharge port of the reaction liquid storage tank; the discharge port of the fourth reaction tank is connected to the feed port of the enzyme inactivation tank; the feed pipelines of the first reaction tank, the second reaction tank, the third reaction tank and the fourth reaction tank are all provided with a peristaltic pump for adjusting the feed speed. The feed speed is adjusted by the peristaltic pump, and the feed and discharge are continuously performed in the continuous reaction system, so as to achieve the production efficiency of glucose-based stevioside and greatly improve the utilization rate of the enzyme.

[0018] The feed inlet of the resin column of the device is also connected to the water storage tank and the desorbent storage tank respectively; the discharge port of the resin column is also connected to the concentration tank respectively; the liquid outlet of the concentration tank is connected to the waste liquid recovery tank. The concentration tank recovers and concentrates the waste water generated by the water washing resin, collects it in the waste liquid recovery tank, and can be used for the preparation of glucose.

[0019] The outer side of the enzyme inactivation tank of the device is provided with a steam coil, the air inlet of the steam coil is connected to the steam storage tank, and the liquid outlet of the steam coil is connected to the steam storage tank through a heater. The temperature required for the enzyme inactivation process is ensured by passing steam into the steam coil, and the steam is heated again by the heater after heat exchange with the reaction liquid in the enzyme inactivation tank and then enters the steam storage tank for use, which further reduces energy consumption.

[0020] The gas outlet of the concentration tank of the device is connected to the reaction liquid storage tank through a condenser. The steam generated during the concentration process is condensed and enters the reaction liquid storage tank to be used again in the preparation of the reaction liquid, so that the waste water is recycled and the production cost of the product is reduced.

[0021] The liquid outlet of the resin column of the device is also connected to the waste liquid recovery tank, and the effluent in the adsorption process is recovered in the waste liquid recovery tank and can be used for the preparation of glucose. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0024] In the figure, 1. reaction liquid storage tank; 2. enzyme inactivation tank; 3. buffer tank; 4. resin column; 5. drying tank; 6. glucose stevioside temporary storage tank; 7. first reaction tank; 8. second reaction tank; 9. third reaction tank; 10. fourth reaction tank; 11. peristaltic pump; 12. enzyme storage tank; 13. alkali solution storage tank; 14. acid solution storage tank; 15. water storage tank; 16. desorbent storage tank; 17. concentration tank; 18. waste liquid recovery tank; 19. stirring device; 20. steam coil; 21. steam storage tank; 22. heater; 23. condenser. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] Example 1

[0029] like Figure 1 As shown, a low-cost device for producing glucose-based stevioside comprises a connected reaction liquid storage tank 1, a continuous reaction system, an enzyme inactivation tank 2, a buffer tank 3, a resin column 4, a drying tank 5 and a glucose-based stevioside temporary storage tank 6;

[0030] The continuous reaction system includes a first reaction tank 7, a second reaction tank 8, a third reaction tank 9, and a fourth reaction tank 10 which are connected in series in sequence, wherein the feed port of the first reaction tank 7 is connected to the discharge port of the reaction liquid storage tank 1; the discharge port of the fourth reaction tank 10 is connected to the feed port of the enzyme inactivation tank 2; the feed pipelines of the first reaction tank 7, the second reaction tank 8, the third reaction tank 9, and the fourth reaction tank 10 are all provided with a peristaltic pump 11 for adjusting the feed speed, and the first reaction tank 7, the second reaction tank 8, the third reaction tank 9, and the fourth reaction tank 10 are all connected to the enzyme storage tank 12, the alkali solution storage tank 13 and the acid solution storage tank 14, so as to facilitate timely adjustment of the pH of the reaction system and timely addition of enzymes, thereby ensuring the smooth progress of the reaction.

[0031] The feed port of the resin column 4 is also connected to the water storage tank 15 and the desorbent storage tank 16 respectively; the discharge port of the resin column 4 is also connected to the concentration tank 17 respectively; the feed liquid outlet of the concentration tank 17 is connected to the waste liquid recovery tank 18.

[0032] Based on the above technical scheme, the reaction raw materials stevioside and dextrin are added to a reaction liquid storage tank 1 filled with a solvent for mixing to obtain a reaction liquid, and then the reaction liquid enters the first reaction tank 7, the second reaction tank 8, the third reaction tank 9, and the fourth reaction tank 10 in series at a certain speed in sequence, and enzymes are added to each reaction tank while entering the reaction liquid. After each reaction tank reacts for a period of time, enzymes are supplemented through the enzyme storage tank 12. The entire reaction process ensures continuous feeding and discharging. The discharge of the fourth reaction tank 10 enters the enzyme inactivation tank 2 for enzyme inactivation treatment, and then enters the buffer tank 3 to cool the liquid, and then enters the resin column 4 for adsorption treatment. After the adsorption is completed, water is pumped into the resin column 4 through the water storage tank 15 for washing, and the washing liquid enters the concentration tank 17 for concentration treatment. The obtained concentrated liquid enters the waste liquid recovery tank 18 for standby. After washing, the desorbent is pumped into the resin column 4 through the desorbent storage tank 16 for desorption, the desorbent liquid enters the drying tank 5, and the obtained product enters the glucose-based stevioside temporary storage tank 6 for storage.

[0033] Furthermore, in this embodiment, the first reaction tank 7, the second reaction tank 8, the third reaction tank 9, and the fourth reaction tank 10 are all provided with pH sensors (not shown in the figure). The above-mentioned configuration can monitor the pH of the reaction system in real time, and is convenient for timely adjusting the pH in each reaction tank, so that the reaction can proceed smoothly.

[0034] Furthermore, in this embodiment, a stirring device 19 is provided in the first reaction tank 7, the second reaction tank 8, the third reaction tank 9, and the fourth reaction tank 10. The specific structure of the stirring device 19 can be selected from the stirring structure commonly used in the field, such as a stirring device 19 composed of a stirring motor, a stirring shaft, and an anchor-type stirring rod. The setting of the stirring device 19 enables the reaction materials to be mixed more fully, thereby improving the reaction efficiency.

[0035] Furthermore, in this embodiment, a steam coil 20 is sleeved on the outer side of the enzyme inactivation tank 2, the air inlet of the steam coil 20 is connected to the steam storage tank 21, and the liquid outlet of the steam coil 20 is connected to the steam storage tank 21 through the heater 22. The temperature required for the enzyme inactivation process is ensured by passing steam into the steam coil 20, and the steam exchanges heat with the reaction liquid in the enzyme inactivation tank 2, and then is heated again by the heater 22 and enters the steam storage tank 21 for reuse, further reducing energy consumption.

[0036] Furthermore, in this embodiment, a stirring device 19 is also provided in the reaction liquid storage tank 1 , the enzyme inactivation tank 2 , the buffer tank 3 , and the drying tank 5 .

[0037] Furthermore, in this embodiment, the gas outlet of the concentration tank 17 is connected to the reaction liquid storage tank 1 through the condenser 23. The steam generated during the concentration process is condensed and enters the reaction liquid storage tank 1 to be used again for the preparation of the reaction liquid, so that the waste water is recycled and the production cost of the product is reduced. Furthermore, the liquid outlet of the resin column 4 is also connected to the waste liquid recovery tank 18, and the effluent of the reacted material during the adsorption process of the resin column 4 and the concentrated material in the concentration tank 17 enter the waste liquid recovery tank 18, which can be used for the preparation of glucose.

[0038] In addition, it should be understood that after reading the contents taught in the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A device for producing glucose-syl steviol glycosides at low cost, characterized in that: It includes a connected reaction liquid storage tank, a continuous reaction system, an enzyme inactivation tank, a buffer tank, a resin column, a drying tank and a glucose-based stevioside temporary storage tank; The continuous reaction system comprises at least two reaction tanks connected in series, each reaction tank having a peristaltic pump disposed on its feed pipeline; each reaction tank is connected to an enzyme storage tank; The feed inlet of the resin column is also connected to a water storage tank and a desorbent storage tank respectively; the discharge port of the resin column is also connected to a concentration tank respectively; and the liquid outlet of the concentration tank is connected to a waste liquid recovery tank.

2. The low-cost device for producing glucosyl steviol glycosides according to claim 1, characterized in that: The continuous reaction system comprises a first reaction tank, a second reaction tank, a third reaction tank and a fourth reaction tank which are connected in series in sequence. The feed port of the first reaction tank is connected to the discharge port of the reaction liquid storage tank; the discharge port of the fourth reaction tank is connected to the feed port of the enzyme inactivation tank.

3. The low-cost device for producing glucosyl steviol glycosides according to claim 2, characterized in that: The feed ports of the first reaction tank, the second reaction tank, the third reaction tank and the fourth reaction tank are all connected to the alkali solution storage tank and the acid solution storage tank, and pH sensors are arranged in the first reaction tank, the second reaction tank, the third reaction tank and the fourth reaction tank.

4. The low-cost device for producing glucosyl steviol glycosides according to claim 2, characterized in that: The first reaction tank, the second reaction tank, the third reaction tank and the fourth reaction tank are all provided with stirring devices.

5. The low-cost device for producing glucosyl steviol glycosides according to claim 2, characterized in that: A steam coil is sleeved on the outer side of the enzyme inactivation tank, an air inlet of the steam coil is connected to a steam storage tank, and a liquid outlet of the steam coil is connected to the steam storage tank through a heater.

6. The low-cost device for producing glucosyl steviol glycosides according to claim 1, characterized in that: The reaction liquid storage tank, enzyme inactivation tank, buffer tank and drying tank are also provided with stirring devices.

7. The low-cost device for producing glucosyl steviol glycosides according to claim 1, characterized in that: The gas outlet of the concentration tank is connected to the reaction liquid storage tank through a condenser.

8. The low-cost device for producing glucosyl steviol glycosides according to claim 1, characterized in that: The liquid outlet of the resin column is also communicated with the waste liquid recovery tank.

Images